Error recovery from use nodes

use 
use What
use Whatever\
use Whatever\{} // cursor inside the braces
use Whatever\{Hello, } // cursor after the comma

Currently all result in

Syntax error, unexpected EOF, expecting ',' or ';' on line 4
==> Node dump:
array(
)

1. Could be a Use node with an empty uses array
2. Could be a Use node with a UseUse for What
3. Could be a Use node with a UseUse with a Name where the last element of parts is an empty string, so that toString() returns Whatever\
4. Could be a GroupUse node with an empty uses array
5. Could be a GroupUse node with a UseUse for Hello and an Error node

I wanted to say thank you for adding all the other improvements so quickly! Being able to work with the parser nodes even in currently-edited documents is extremely powerful and I now have IDE-like completion for the common use cases (variables, keywords, methods, properties, classes, static class properties / methods / constants). That would have been so much harder with just tokenization.

The issue provides PHP examples for incomplete use and group-use statements but does not name files, tests, or a preferred AST result. Start by locating the parser entry point for use statements and existing error-recovery tests, then establish the intended node representation for each example before implementation.